The mass exclusion limits for the BSM vector resonances with the direct couplings to the third quark generation

TL;DR

This paper investigates how direct couplings of a new vector resonance to the third quark generation affect the mass exclusion limits derived from LHC data, highlighting potential reductions in these limits.

Contribution

It analyzes the impact of direct third-generation couplings on mass exclusion limits for BSM vector resonances, addressing limitations of previous bounds.

Findings

Direct couplings can lower mass exclusion limits.

Bounds depend on resonance interaction characteristics.

Analysis specific to strongly coupled $SU(2)_{L+R}$ vector triplet.

Abstract

The upper bounds that the LHC measurements searching for heavy resonances beyond the Standard model set on the resonance production cross sections are not universal. They depend on various characteristics of the resonance under consideration, and their validity is also limited by the assumptions and approximations applied to their calculations. The bounds are typically used to derive the mass exclusion limits for the new resonances. We address some of the issues that emerge when deriving the mass exclusion limits for the strongly coupled composite $SU(2)_{L+R}$ vector resonance triplet which would interact directly to the third quark generation only. We show that the presence of such interactions in the model can lower the mass exclusion limits.